Steam eye masks are packed with hydroxy iron powder, when the oxygen in the air in contact with the hydroxy iron powder can occur after the oxidation reaction, generating heat, which eventually heats up the moisture in the air, generating steam to the eyes for the role of hot compresses; steam eye masks can have beneficial effects on the eyes, but can also cause some adverse effects: 1, benefits: the warm steam of steam eye masks can stretch the blood vessels around the eyes, promote the blood circulation, can play a role in soothing muscle fatigue around the eyes, can dissipate local inflammation, relieve the patient’s dark circles situation, but also help improve the patient’s sleep. At the same time, the design of disposable packaging is easy to carry and timely use; 2, harm: steam eye mask if the quality of the problem of heating up too quickly, there may be burns, resulting in eye redness, pain, eye skin damage and other hazards; in addition, prolonged use of steam eye mask, will lead to faster evaporation of tears, patients appear dry eyes, fatigue, transient vision loss and other situations. Therefore, it is recommended that patients avoid long-term use of steam eye masks, can be used at intervals of several days, each time not too long; at the same time should choose the regular manufacturer of steam eye masks to use, to ensure the safety of use.